Fluid pump



July 24, 1928.v 1,678,052 v M. BENNITT A v FLUID PUMP Filed Nov. e, 1922 2 shets-sheet 1 July 24, 1928.

M. BENNITT FLUID PUMP Filed Nov. e. 1922 2 sheets-Sheet 2 Cil Patented July 24, 1928.

MARK BENNITT, 0F SAN FRANCISCO, CLIFORNIA.

FLUID PUMP.

Application flied November e', i922. serial No. 599,436.

My invention relates to improvements in rotating pumps. The objects of my .invention are to provide: first, a pump unit having a wide range of adaptabilityso that the number of units may be adapted to the duty required; second, a pump so constructed. as to be run at various speeds and delivering various quantities; third, an efiicientpunip, simple in construction and veconomical in upkeep; fourth, a low-speed pump, the units being so spaced as to make a series of short lifts, making high speed unnecessary; fifth, a pump than can betaken out and replaced without disturbing the casing in which it is installed; sixth, a pump whose bearings are protected from the entry of sander other grit and therefore having a long life. I attain these objects in the manner shown in the accompanying drawings and hereinafter described. v

My invention is designed primarily for lifting or propelling water but is adapted to handling heavier or lighter fiuids. My pump unit is adapted to numerous modifications of the installation, to be'used in .such places as'mines, quarries, factories, ships, railroad yards, tanneries, refineries, dredges, placer mines, drainage and irrigation works, dry-docks and'wellsof all depths. y

My pump for deep wells is designed to be installed in units or Istages in the standard` types and sizes of well casings, making a succession of comparatively low lifts by yreason of spacing the units at approximately equidistant intervals o n the line of shafting. I, design to have the bottom unit submerged, making priming unnecessary; although the pump has the suction equivalent of otherrotating pumps of Ithe centrifugal or turbine class. The units of any given size areduplicates and when more than one unit'is required they are installed on the saine line of shafting.r Each unit is a complete pumpin itself, separated from the others by an interval of shafting.

The preferred'plan of installation for deep wells is the one indicated by thedrawings accompanying this specification, the 'pump unit fitting the casing but not being attached to it. By this plan the pump casingV is installed first and the pump units are lowered to place afterward. This plan permits the convenient removal and replacement of the pump at will without the trouble and exense of taking out the casing. Each of the six figures of the accompanying drawingsV shows a vertical section of my pump kunit assembled on a short shaft and in place in a casing, theA parts indicated by numbers. The corresponding parts in.y the several figures are indicated by corresponding numbers. Additional numbers are used foradditional parts or features in Figs. 3 and t, and in Figs. 5 and 6. The several figures are presented also to yshow different types of rotors and their relation to .the other parts. p

In the drawings, l is the tapered rotor; 2 2, the spiral impelling vanes; 3, the adjustingl sleeve and bearing protector; 4, the tapered stationary rotor-seat and bearing support; 5 5, the fiat partitions which directly support the bearing; l6, the bushing; 7 7, the resilient annular rings or bands around the outside of the rotor-seat and bearing support; 8 8, the ba-nd or sheath covering thepresilient rings; 9, the shaft; 10 10, the shaft couplings; 11 11, the casing; 12, the bearing; 13, Fig. 8, an eXtra` sleeve telescopingo'ver the adjusting sleeve; 14, in Fig. 4,21 variation of thek lower end of the sleeve to cover the bushing, thimble or housing, the sleeve being attached to and 'turning with the shaft, a shoulder in the sle'eveforming ar thrust bearing on the end of the bushing, thimble or housing; l5, Fig. 5, another variation, showing the bearing protector held in adjustment against a shoulder on the shaft and forming a thrust bearing against the bushing or housing; 16, Fig.

6, a variation r'showing the bushing extending above the housing and forniing a thrust bearing against a shoulder on the shaft, the bearing being protected by a telescoping sleeve attached to and turning with the shaft. l

F ig. l, shows the preferred construction of my rotating pump unit; l my tapered rotor with spiral impelling vanes, 2 2,

which are open or free on their outer edge and which combine in their action both a centrifugal and propeller force in a diagonal upthrust, the rotor being designed to receive the fluid at its center near the shaft and discharge it upward and from theA top of thel rotor at its outer edgcnear the casing. The adjusting or spacing sleeve, 3, is preferably fixed in the top of the bearing, l2. and extends into a counter-bore in the rotor, forming an end or thrust bearing, where the rotor may revolve freely upon it.. The

sleeve may be in the form of a long bushing extending from the lower part of the bearing to the counter-bore in the rotor. The counter-bore is of suoli depth that the upper end of the sleeve or extended bushing is the tapered rotor, l, with spiral impelling vanes, 2 2, is shown as the male element in the correspondingly tapered, rotor-seat, Zi, as the female element, with the adjusting sleeve and bearing protector, 3, in position between them. The adjusting sleeve, in its several variations, permits the rotor to operate close enough to the rotor-seat, without contact with saine, to prevent an appreciable backk flow of fluid and consequent loss of efiiciency in the pump. The fiat partitions between the outer wall of the bearing support and the central bearing form tubular channels for the passage of the fluid and also serve to stop the swirling of the fluid as it approaches the inlet of the rotor in the neck of the rotor-seat and bearing support, thus enabling the spiral vanes to pick it up edectively. The bushing, 6, is of the oilless type. The pump unit is held central in the casing by means of resilient, annular rings, 0r bands, 7--7, around the exterior circumference of the rotor seat and bearing support. The resilient rings are preferably protected by a metallic band or sheath, lapped at the ends so as to adjust itself to any inaccuracies in the casing as the pump unit is lowered to place. This band or sheath, at top and bottom, is conveniently secured in place by being folded inward over parts of the rotor-seat and bearing support. rIhe resilient rings and protecting sheath, pressing against the casing wall, also serve to prevent the baclefiow of fluid around the pump unit.

Fig. 2, shows my pump unit with a tapered rotor having the spiral impelling vanes enclosed by a shell, but otherwise as previously described.

Fig. 8, shows my pump unit with tapered rotor having the spiral impelling vanes enclosed by a shell and discharging at the sides instead of at the top of the rotor. In the same drawing, Fig. 3, an eXtra sleeve or thimble is shown fixed in the counter-bore of the rotor and telescoping over the adjust ing sleeve, this variation of construction being designed for use in dredge work, placer mines, etc., where the water is heavily charged with sand, this sleeve or thimble providing. an eXtra protectionto the bearing against the entry of grit.

Fig. e, shows a fourth type ofv rotor, in which the spiral impelliiig vanes have a more pronounced centrifugal thrust near the center ofthe rotor, curving to an upward, propeller thrust at the rim of the rotor. The sleeve, 3-M, is fixed to the shaft and at its lower end, ifi, is enlarged to telescope over an extension of the bushing, thimble or housing, thcrsleeve having an inside shoulder to form a thrust bearing upon the part over which it telescopes, the object being the same as in the previously described construction, namely, to protect the bearing against the entry of sand or other grit and to hold the rotor and the rotor-seat and bearing support in adjustment with reference to each other.

Another variation of construction is shown at l5, Fig. 5, which provides a shoulsie shoulder on the shaft, being covered by a telescoping sleeve attached` to and turning with the shaft, the construction serving the saine purpose, that of excluding grit, as the variations previously described.

I claim w l. In a rotary pump unit, lthe combination of a shaft, a tapered rotor mounted thereon having spiral impeller blades, a rotorseat for saidrotor loosely mounted on said shaft lill) and inwardly tapered to correspond to the i,

tapered rotor and a collar on said shaft to support said rotor-seat.

2. In a rotary pump unit, the combination of a shaft, a tapered rotor mounted thereon having spiral impeller blades, a rotor-seat for said rotor loosely mounted on said shaft and inwardly tapered to correspond to the tapered rotor, an adjusting sleeve between said rotor and said rotor-seat, and a collar on said shaft to support said rotor-seat.

3. In a rotary pump unit, the combination of a shaft, a tapered rotor mounted thereon having spiral impeller blades and a hub having a recess surrounding said shaft, a rotorseat for said rotor loosely mounted on said shaft. and inwardly tapered to correspond to the tapered rotor, an adjusting sleevebetween said rotor and said rotor-seat and eX- tending into said recess, and a collar'on said shaft to support said rotor-seat. Y

t. In a rotary puinpunit, the combinatie of a shaft, a tapered rotor mounted thereon having spiral impeller blades, a rotor-seat Vfor said rotor loosely mounted on said shaft,

and inwardly tapered to correspond to .the tapered rotor, an adJusting sleeve between said rotor and said rotor-seat, a second sleeve llO fixed in a recess surrounding said shaft in said rotor and telescoping over said adjusting sleeve, and a collar on said shaft to support said rotor-seat.

5. In a rotary pump unit, the combination of a shaft, a rotor mounted thereon having spiral impeller blades and a hub having a recess surrounding said shaft, a bearing for said shaft, a sleeve surrounding said shaft and xed in a recess in said bearing and eX- tending loosely into said recess in said rotorhub.

6. In a rotarypump unit, the combination of a shaft, a rotor mounted thereon, a bearing;` forv said shaft, a sleeve surrounding said shaft and fixed in a recess in said bearing and extending into a recess in said rotor, a second sleeve lixed in a recess in the said rotor and telescoping over the first sleeve.

7. In a rotary pump unit, the combination of a shaft, a rotor mounted thereon having spiral impeller blades, a seat for said rotor loosely mounted on said shaft, a collar on saidfshaft to support said rotor-seat, a casing surrounding said pump unit and a resilient band or bands on the periphery of said rotor-seat between said rotor-seat and said casing.

8. In a rotary pump unit, the combination of a shaft, a rotor mounted thereon having spiral impeller blades, a seat for said rotor loosely mounted on said shaft, a collar on said shaft to support saidrotor-seat, a casingr surrounding said pump unit, a resilient band or bands on the periphery of said rotor-seat, anda sheath lapped so as to be self-adjusting to the casing and between the said resilient bands and said casino.

MARK BENNITT. 

